This film, despite its straightforward story and basic writing, managed to frighten audiences in a way that still influences horror movies today. You’ve seen haunted house films before? You probably think they're all the same… but I don’t believe it. This one feels like an ancestor to many of them! It’s largely been forgotten over time, though there was a weaker remake in 1999, and it seems likely that this film itself is based on “House on Haunted Hill,” which came out three years earlier in 1959 and also deserves a fresh version. The impact the film had on the horror genre and filmmaking overall was significant and you can still see its effects. The story introduces us to Hill House, a mysterious mansion with a dark history and a string of deaths. Unlike the more recent remake, this movie doesn’t try to explain where that evil comes from; it simply accepts it and puts the characters inside, supposedly for a poorly planned paranormal investigation led by a parapsychologist desperate to prove ghosts exist and there's an afterlife. As a narrative, the film is honestly flawed and leaves you with more questions than answers. It presents a psychological experiment that’s conducted without any real thought given to how it should be done; if it were true, it would have shocked scientists and led to legal trouble. Of course, such a study would need to stop immediately if one of the participants showed signs of mental distress. Details like the fact that the subjects sign waivers, fully aware of what’s going to happen and the risks involved, are ignored, as are the caretakers' resentment over the extra work or Eleanor’s family’s lack of involvement, which highlights how disconnected she feels. The cast isn’t particularly famous, but they do a good job. Lois Maxwell is probably the most recognizable name, though her role is brief and doesn’t add much. She plays what appears to be the most rational person in that chaotic setting. And I'm not saying I don't believe in ghosts—I actually do—but I find living people more frightening than the dead, and I won't tolerate nonsense. Julie Harris truly shines with a captivating and unsettling portrayal of someone on the verge of a mental breakdown. She’s sympathetic, and you feel her fear alongside hers. Claire Bloom also delivers an interesting performance that is more subdued and sarcastic. If you’re expecting jump scares or skeletons dangling from strings, forget about it: this film doesn't rely on cheap thrills, instead using sound, visuals, shadows, and camera angles to build a sense of dread. The result works well; when you don’t see what’s frightening you, you don’t know what to expect, which is unsettling. There are knocks on wood, heavy footsteps, doors slamming, muffled laughter—the range of sounds is extensive and used in a creative and believable way. The setting itself, a large English neo-Gothic mansion, is magnificent and put to good use. All the interior sets look authentic and well-crafted. The house feels like its own character – a villain worthy of an entire series.

Source on TMDB